It would depend on if your tires were losing grip to the surface or getting gummy because of it. If wearing through your sauce is losing grip I think the harder tire/more sauce techique would work. On the other hand, you could get similar results with a tire with a bit more grip due to soft and gummy compound which could work when dry, in which case front sauce is less of an issue because the tire is effectively providing its own grip instead of needing traction additive.